XT Series Personal Gas Detector
11
6. Performing a Self-Test
When the Test button is pressed the unit checks the sensor, circuit, batteries, audible and visual
alarms and vibrating alarm.
After 24 hours has elapsed since the self-test was last performed the Test Pass icon ( ) will
be blinking. The self-test must then be performed by pressing the Test button. The detector will
do the following:
Turn on all the display elements•
Tests the audible and visual alarms and vibrating alarm•
Check the battery, electronic circuit and sensor•
Perform a sensor test•
Display the level 1 and level 2 alarm setpoints•
Display the maximum (minimum for O•
2
) gas reading (if such a reading has occurred)
If a gas alarm has occurred since the Test button was last pressed the relevant alarm •
level icon will be displayed
Lifetime Remaining (for units with Real Time Display)•
The result of the self-test as follows:•
Self-Test Result Display Audible Alarm Visual Alarm
Pass None None
Fail 1 long beep 1 flash
If the self-test fails repeat the self-test. The XT will warm up for one minute before the next self-
test is performed. If it fails three consecutive times then the detector will display an error code
(see Section 10).
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